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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Jan. 01, 2020
Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Percentage of voting power | 50.00% |  |  |  |
VIEs' non-cash operating expenses | $ 500 | $ 400 | $ 14,800 |  |
Subsidiaries’ non-cash operating expenses | $ 2,500 | 4,700 | 35,800 |  |
Number of operating segments | 1 |  |  |  |
Number of reportable segments | 1 |  |  |  |
Redeemable preferred shares term | 5 years |  |  |  |
Contract liabilities |  |  |  |  | $ 1,925
Revenue included in contract liability | $ 1,575 | 889 | 1,925 |  |
Advertising and promotional expenses | 2,217 | 2,846 | 2,695 |  |
Contributions by employer to plan in the PRC | 1,909 | 3,074 | 2,077 |  |
Inventory write-downs | 138 | 12 | $ 948 |  |
Allowance for doubtful accounts | $ 4,519 | $ 3,350 |  |  |
Class A Ordinary Shares [Member] |  |  |  |  |
Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Shares issued (in Shares) |  |  |  | 29,000,000 |
Shares outstanding (in Shares) |  |  |  | 29,000,000 |

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